A geological core repository is an unusual endeavor for a scientific institution. Typically, core storage is managed by the state or large mining companies. For instance, the Central Core Repository of the Republic of Karelia is under the authority of the RK Ministry of Natural Resources and Environment. Scientists emphasize that this new facility for the storage and study of geological samples is not conceived as an alternative to state-managed core repositories. It is intended to be a specialized scientific platform for dealing with fundamental challenges in geology and geochemistry.
– The potential of this research is directly tied to theoretical tasks in the science of geology: reconstructing early Earth conditions, studying the genesis and evolution of magmatic complexes and magmatic differentiation processes, and reconstructing ancient geochemical and atmospheric conditions. Isotopic and mineralogical-geochemical studies of the profiles exposed by such cores provide data on the composition of ancient hydrospheric and atmospheric systems, including the early Earth oxygen evolution, – shared Sergey Svetov, Director of the Institute of Geology KarRC RAS.
Scientists are already using the repository in their studies. Holding a drill core fragment is Leading Researcher at IG KarRC RAS Artyom Konyshev
The repository occupies a dedicated space on the premises of the Agrobiological Station of the Karelian Research Centre. From the project’s inception stage, the Centre provided the space to house the collection and assisted with the infrastructure, including renovation of the premises and creating proper storage conditions. The institute’s staff now continue improving the facilities. At the same time, younger researchers are engaged in systematizing, cataloging, and arranging the collection into a fully functional system for storage and use. Five-meter long rock cores are packed in specialized boxes and arranged according to sampling depth and provenance. There are specimens from the Kondopoga, Muezersky, Pudozh, and Sortavala Districts, and the Kostomuksha iron-ore field. The collection features representative section fragments, showcasing Proterozoic layered intrusions associated with titanomagnetite and platinum-group mineralization, as well as graphite-bearing complexes of Karelia. The institute’s researchers, graduate and post-graduate students already use the repository for ongoing studies.
Ekaterina Klimovskaya, Junior Researcher at the Laboratory of Ore-forming Systems and Mineral Resources, Institute of Geology KarRC RAS
– By creating such a collection, we open perspectives for future generations of researchers by preserving unique geological material. Some questions in science remain unresolved, and require the application of unique techniques, such as fine-scale stable isotope analysis and other high-resolution analytical approaches. That is why our key task now is to preserve, systematize, and thoroughly document the existing material so that, as technologies advance, we can revisit it at a new level, – added Sergey Svetov.
Unlike museum rock specimens, a core is a cross-sectional record of a geological borehole – showing the depth-wise sequence of rock types.
– A core also allows researchers to observe a wider variety of interesting rocks and their ratios within a single sample. Furthermore, with such a library at hand, geologists can work with bedrock that cannot be accessed except by drilling, e.g. when it is covered up by a thick layer of sand sediments. We encounter that the Pudozh District, – noted the project supervisor, Oleg Maximov, Deputy Director of the Institute of Geology KarRC RAS.
Employees of the Institute of Geology KarRC RAS Oleg Maksimov and Yuri Smirnov furnish the repository
The project was made possible by collaboration with industrial partners and geological survey organizations. The scientists extend special thanks to Polymetal company, mining enterprises in the Kostomuksha Municipality, and the organizations that conducted drilling operations at certain sites in Karelia, who handed samples over for scientific storage and research. The Institute of Geology plans to continue expanding the collection and remains open to cooperation with mining companies.